The Disney sound source is very similar to a standard DAC on a parallel
port but it requires extra programming effort to send DAC bytes to.

The Disney DAC cannot be reliably auto-detected. Ask the user which
LPT port they have it attached to and then look up the BASE_PORT for that
LPT port from the BIOS data area (0040:0008..). For a majority of PC's
0x378 is LPT1.

The Disney sound source runs from batteries. To save battery drain you
must always turn the sound source on before you use it, and off when you
have finished with it.